The Trap,steam, cataloged under National Stock Number 4730-01-421-0146, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Armstrong International Inc Dba Armstrong Machine Works. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-421-0146 |
| Primary Part Number | 981 3/4IN SW 3/16 ORIFICE |
| Item Name | Trap,steam |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Armstrong International Inc Dba Armstrong Machine Works |
| Status | ACTIVE |
| Design Type | BUCKET |
| Inlet Connection Type | SOCKET WELDING |
| Maximum Steam Working Pressure | ERR-060 |
| Body Design | STRAIGHT HORIZONTAL PATTERN |
| Material | STEEL UNS J03002 OVERALL |
| Furnished Items | STRAINER |
| Outlet Connection Type | SOCKET WELDING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 981 3/4IN SW 3/16 ORIFICE PRIMARY | Armstrong International Inc Dba Armstrong Machine Works (USA) |
NSN 4730-01-421-0146 is a Trap,steam, manufactured by Armstrong International Inc Dba Armstrong Machine Works, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-421-0146 has 1 manufacturer part number on file: 981 3/4IN SW 3/16 ORIFICE (Armstrong International Inc Dba Armstrong Machine Works).
Key specifications for 981 3/4IN SW 3/16 ORIFICE: Design Type: BUCKET; Inlet Connection Type: SOCKET WELDING; Maximum Steam Working Pressure: ERR-060; Special Features: 0.188 IN. ORIFICE IN. 7 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.